Base Assembly for Floor Cleaner

ABSTRACT

The present invention relates to a base assembly for a floor cleaner configured to clean a floor through linear reciprocation movement of two rag attachment pads through which the two rag attachment pads come close to and go away from each other. More particularly, the present invention relates to a base assembly for a floor cleaner capable of simultaneously conducting cleaning and sterilization of a floor by injecting steam onto the rag attachment pads while the rag attachment pads are being reciprocally moved.

TECHNICAL FIELD

The present invention relates to a base assembly for a floor cleanerconfigured to clean a floor through linear reciprocation movement of tworag attachment pads through which the rag attachment pads come close toand go away from each other, and more particularly a base assembly for afloor cleaner capable of simultaneously conducting cleaning andsterilization of a floor by injecting steam onto the rag attachment padswhile the rag attachment pads are being reciprocally moved.

Background Art

In the prior art, publications, for example, Patent Documents arepresented that disclose floor cleaners configured to clean a floor bylinearly reciprocating opposite rag attachment pads.

A floor cleaner body disclosed in the Patent Documents includes: asupport member; a driving unit positioned on the support member; powerconversion units configured to convert rotating movement provided fromthe driving unit into linear reciprocation movement; first and secondmoving members positioned below the support member, and configured toreceive power from the power conversion units to conduct linearreciprocation movement; and a path providing module configured toprovide a path guiding the linear reciprocation movement of the movingmember.

The driving unit reduces the rotation speed of the driving motor througha belt, and then rotates opposite pulleys, thereby repeatedly making thefirst and second moving members come close to and go away from eachother.

The path providing module includes: sliding members which are mounted onthe moving members to be linearly reciprocated therewith, respectively;and a guide member fixed to the support member and configured to guidethe linear reciprocation movement of the sliding members.

The guide member further includes a bearing in a hollow hole of thecylinder in order to allow the shaft to conduct the linear reciprocationmovement smoothly. However, the conventional floor cleaner has problemsas follows.

Because the power is transmitted using the pulleys and belt, the drivingmotor should be vertically installed. Due to this, the height of thebody is increased. As a result, the floor cleaner has restrictions inintroducing the floor cleaner into a gap below a sofa, furniture, a bed,etc.

In addition, because the construction of the belt and pulleys iscomplicated, and the power conversion units are arranged to be spacedaway from each other to the opposite sides of the rotation axle of thedriving motor, the width of the floor cleaner is also increased.

Meanwhile, because the first moving member and the second moving memberare linearly reciprocated in a state where they are compressed againstthe floor, a bearing is employed to conduct this action smoothly.

The bearing may help the linear back and forth reciprocation movement tobe conducted smoothly while supporting a weight. However, because asliding structure should be added and assembled to the bearing, theconstruction of the floor cleaner becomes complicated, and the price ofthe bearing is very expensive.

PRIOR ART DOCUMENTS

Patent Document 1: Korean Patent Laid-open Publication No.10-2009-0115573

Patent Document 2: Korean Patent Laid-open Publication No.10-2009-0115574

Patent Document 3: Korean Patent Laid-open Publication No.10-2009-0115575

Patent Document 4: Korean Patent Laid-open Publication No.10-2009-0115576

Patent Document 5: Korean Patent Laid-open Publication No.10-2009-0117545

DISCLOSURE OF INVENTION Technical Problem

The present invention has been made in an effort to solve theabove-described problems, and an object of the present invention is toprovide a base assembly for a floor cleaner which enables steam to beinjected to a reciprocating pad.

Solution to Problem

In order to achieve the above-mentioned object, the inventive baseassembly for a floor cleaner defined in claim 1 includes: a body caseincluding a base and a cover configured to cover the base; one or morerag attachment pads disposed on the bottom surface; a driving membermounted on the base; one or more pad reciprocation members configured toreceive power from the driving member and to linearly reciprocate therag attachment pad; one or more pad guide members configured to guidethe linear reciprocation movement of the rag attachment pads in relationto the base; a steam supply port formed in the base; and a distributionpath formed on the bottom surface of the base and configured todistribute steam discharged from the steam supply port to the ragattachment pad. The rag attachment pads are formed with steam passageholes that allow the steam discharged from the distribution path to passthrough the steam passage holes.

According to the inventive base assembly for a floor cleaner defined inclaim 2, the distribution path is constituted by a distribution grooveformed on the bottom surface of the base to be communicated with thesteam supply port, and a steam injection cover formed with a pluralityof steam injection holes for injecting steam to the rag attachment pads,and configured to cover the distribution groove. The steam injectionholes are formed with steam injection protrusions protruding toward thesteam passage holes, and each of the steam passage hole is formed by anelongated hole.

The base member assembly for a floor cleaner defined in claim 3 furtherincludes one or more pad guide members configured to guide the linearreciprocation of the rag attachment pads in relation to the pad. The padguide members are constituted by slope rails formed in the left andright sides of the base, and left and right slope wheels installed onthe opposite sides of the rag attachment pad and rolling along the leftand right slope rails. The left and right slope rails are constituted byleft and right slope rail grooves formed on the left and right sides ofthe bottom surface of the base, and contacted with the top surfaces ofthe left and right slope rolls. The left and right roll abutment piecesconfigured to abut the left and right slope rolls are fastened to thebottom surface of the base.

The base member assembly for a floor cleaner defined in claim 4 furtherincludes one or more pad reciprocation members configured to receivepower from the driving member and to linearly reciprocate the ragattachment pad. The rag attachment pads are constituted by first andsecond rag attachment pads disposed on the front and rear sides of thebottom surface of the base, and the pad reciprocation members areconstituted by first and second pad reciprocation members which areconfigured to receive the power of the driving member and to make thefirst and second rag attachment pads come close to and go away from eachother. The pad guide members are constituted by first and second padguide members configured to guide the linear reciprocation movements ofthe first and second rag attachment pads, and the base is formed with athrough-hole, and the driving member is a driving motor. The first andsecond pad reciprocation members include: first and second padreciprocation eccentric cams, to each of which a rotation axle of thedriving motor is eccentrically joined; and first and second padreciprocation rods, one end of each of the first and second padreciprocation rods being installed on one of hinge brackets of the firstand second rag attachment pads, and the other end of each of the firstand second pad reciprocation rods being installed on one of the firstand second pad reciprocation eccentric cams. The driving member ishorizontally arranged on the base.

Due to the configuration of the slope rails and slope wheels, it ispossible to obtain a driving force to allow a pair of rag attachmentpads to move oppositely to come close and go away from each other usinga single driving member.

In addition, because the driving member is constituted by a drivingmotor, a planetary reduction gear configured to reduce the rotatingspeed of the driving motor, and a rotation axle configured to receivethe power of the planetary reduction gear, the rotation axle of thedriving motor can be positioned at the rotation center rather than beingpositioned eccentrically. Accordingly, the first and second padreciprocation members may be commonly coupled to the single rotationaxle, and with this arrangement, the driving motor may be horizontallyarranged, thereby substantially reducing the height of the body case.

Advantageous Effects of Invention

According to the present invention as described above, it is possible toachieve various effects as follows.

Because the steam distribution path is laid directly above thereciprocating pads, not only a floor wiping effect but alsosterilization of floor can be achieved.

Especially, because the steam injection protrusions are formed in thedistribution path, thereby being arranged above the steam passage holes,steam can be injected to rags and pads at a position very close to therags or pads to such an extent that the steam can sufficiently permeateinto the rags or pads.

As the slope rails are constituted by the slope rail grooves formed onthe bottom surface of the base, it is possible to avoid the slope wheelsfrom being mounted in the inside of the body case, and hence to suppresssteam from flowing backward into the inside of the body case.

Due to the configuration of the slope rails and slope wheels, it ispossible to obtain a driving force to allow a pair of rag attachmentpads to move oppositely to come close and go away from each other usinga single driving member.

In addition, because the driving member is constituted by a drivingmotor, a planetary reduction gear configured to reduce the rotatingspeed of the driving motor, and a rotation axle configured to receivethe power of the planetary reduction gear, the rotation axle of thedriving motor can be positioned at the rotation center rather than beingpositioned eccentrically. Accordingly, the first pad reciprocationmember and the second pad reciprocation member may be commonly coupledto the single rotation axle, and with this arrangement, the drivingmotor may be horizontally arranged, thereby substantially reducing theheight of the body case.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front side perspective view illustrating a floor cleaneraccording to an exemplary embodiment of the present invention;

FIG. 2 is a rear side perspective view of FIG. 1;

FIGS. 3 and 4 are front and rear side exploded perspective viewsillustrating a base assembly for the floor cleaner according to theexemplary embodiment of the present invention;

FIGS. 5 and 6 are perspective views illustrating a principal part inassembled and disassembled states, respectively;

FIG. 7 is a perspective view illustrating a driving member and amounting case according to an exemplary embodiment of the presentinvention in a separated state;

FIG. 8 is a rear view of a base assembly for a floor cleaner accordingto an exemplary embodiment of the present invention;

FIG. 9 is a cross-sectional view taken along line q-q or line q′-q′ofFIG. 8; and

FIG. 10 is a perspective view illustrating the rag attachment pad ofFIG. 3 in an enlarged scale.

MODE FOR THE INVENTION

Hereinbelow, an exemplary embodiment of the present invention will bedescribed with reference to accompanying drawings.

FIG. 1 is a front side perspective view illustrating a floor cleaneraccording to an exemplary embodiment of the present invention, FIG. 2 isa rear side perspective view of FIG. 1, and FIGS. 3 and 4 are front andrear side exploded perspective views illustrating a base assembly forthe floor cleaner according to the exemplary embodiment of the presentinvention. In addition, FIGS. 5 and 6 are perspective views illustratinga principal part in assembled and disassembled states, respectively,FIG. 7 is a perspective view illustrating a driving member and amounting case according to an exemplary embodiment of the presentinvention in a separated state, and FIG. 8 is a rear view of a baseassembly for a floor cleaner according to an exemplary embodiment of thepresent invention. Moreover, FIG. 9 is a cross-sectional view takenalong line q-q or line q-q of FIG. 8, and FIG. 10 is a perspective viewillustrating the rag attachment pad of FIG. 3 in an enlarged scale.

As illustrated in FIGS. 1 and 2, a floor cleaner 10 according to anexemplary embodiment of the present invention generally includes a baseassembly 100, a pushrod assembly 300, and a neck assembly 500 configuredto support the pushrod assembly 300 to be pivotable back and forth inrelation to the base assembly 100, which form the external appearance ofthe floor cleaner.

As illustrated in FIGS. 3 and 4, the base assembly 100 includes a bodycase 110, a pair of rag attachment pads 130 disposed on the bottomsurface of the body case 110, a driving member 150 equipped in theinside of the body case 110, a pair of pad reciprocation members 170configured to receive power of the driving member 150 and to linearlyreciprocate the rag attachment pad 130 back and force, and a pad guidemember 190 configured to guide the linear reciprocation movement of therag attachment pad 130 in relation to the body case 110.

The body case 110 is configured by a base 111, and a cover 113configured to cover the top of the base 111.

In the central area of the base 111, a front through-hole 111 a and arear through-hole 111 b are provided so as to allow the rag attachmentpad 130 and the pad reciprocation members 170 to be interconnected witheach other.

As hinge brackets 173 a and 173 b to be described later extend upwardthrough the front through-hole 111 a and the rear through-hole 111 b, astroke distance is provided which enables back and forth reciprocationmovement.

For this reciprocation movement, it is preferable that the frontthrough-hole 111 a and the rear through-hole 111 b are implemented in anelongated bore type extending in the forward-backward longitudinaldirection as large as possible.

In addition, the front through-hole 111 a and the rear through-hole 111b may be formed as a single opening. However, in order to suppress theinfiltration of foreign matter from the outside and to reduce thebackward flowing amount of steam to be described later to the utmostwhile securing an opening in as large a size as required, it isdesirable to divide the opening into two.

At the central portion of the cover 113, a communication hole 115 isformed that allows the neck assembly 500 to be communicated with thepushrod assembly 300. The neck assembly 500 will be described later indetail.

The rag attachment pad 130 is formed by two pads, i.e. a front ragattachment pad 130 a at the front side and a rag attachment pad 130 b atthe rear side.

In addition, the first rag attachment pad 130 a and the second ragattachment pad 130 b are disposed below the bottom surface of the base111 to be capable of linearly reciprocating in such a manner that theycan be moved close to and away from each other.

The first rag attachment pad 130 a and the second rag attachment pad 130b are preferably formed with (not shown) pad attachment protrusions of aVelcro strip type to attach a pad, or clips (not shown) to grip a rag.

Preferably, the driving member 150 is implemented by a driving motor151.

More preferably, the driving member 150 is implemented by a driving unit152 in which a reduction gear is additionally provided to reduce therotating speed of the driving motor 151.

Such a reduction gear increases starting torque to provide smooth linearreciprocation movement. In the present embodiment, a planetary reductiongear 153 is used which is joined to the output spindle of the drivinggear 151.

A rotation axle 153 a of the planetary reduction gear 153 is installedon the central rotation axis non-eccentrically.

As illustrated in FIGS. 5 to 7, the driving member 150 is inserted intoand supported by the motor mounting case 155 that encloses driving motorunit 152.

That is, the motor mounting case 155 is provided with a cylindricalmotor mounting tube 156, and a closure plate 157 that blocks one side ofthe motor mounting tube 156.

The motor mounting tube 156 is provided with a plurality of coolingthrough-holes 156 a for allowing contact with the ambient air.

In addition, in the left and right sides of the motor mounting tube 156,flanges 156 b and vertical fastening holes 157 c are formed.

The closure plate 157 is formed with a draw-out hole 157 a, throughwhich the rotation axle 153 a is drawn out, and horizontal fasteningholes 157 b, to which the planetary reduction gear 153 is fastened.

The vertical fastening holes 157 c of the motor mounting case 155 arefastened with and supported by the fastening ribs 112 formed on the topside of the base 111.

The pad reciprocation members 170 are constituted by a first padreciprocation member 170 a and a second pad reciprocation member 170 b.

The first pad reciprocation member 170 a is constituted by a first padreciprocation eccentric cam 171 a to which the rotation axle 153 a iseccentrically joined, and a first pad reciprocation rod 175 a, one endof which is installed on a first hinge bracket 173 a of the first ragattachment pad 130 a inserted through a through-hole 111 a, and theother end of which is installed on a first pad reciprocation eccentriccam 171 a.

Like the first pad reciprocation member 170 a, the second padreciprocation member 170 b is constituted by a second reciprocationeccentric cam 171 b, to which the rotation axle 153 a is eccentricallyjoined, and a second pad reciprocation rod 175 b, one end of which isinstalled on the second hinge bracket 173 b of the second rag attachmentpad 130 b inserted through the through-hole 111 b, and the other end ofwhich is installed on a second pad reciprocation eccentric cam 171 b.

The hinge brackets 173 a and 173 b and the other ends of the padreciprocation rods 175 a and 175 b are joined by hinge axles 177 a and177 b.

The one end of each of the pad reciprocation rods 175 a and 175 b arefixed by insert-molding each of the pad reciprocation eccentric cams 171a and 171 b.

Each of the pad reciprocation eccentric cams 171 a and 171 b have acircular shape, and the rotation axle 153 a is joined at a positionoff-centered in relation to the center of each of the pad reciprocationeccentric cams 171 a and 171 b (i.e. the centers are positioned outwardin relation to the rotation axle). Accordingly, when the rotation axle153 a is rotated so that the centers of the pad reciprocation eccentriccams 171 a and 171 b are moved inward in relation to the rotation axle153 a, the rag attachment pads 130 a and 130 b come close (approach) toeach other, and when the centers are moved outward, the rag attachmentpads 130 a and 130 b go away (retreat) from each other. Consequently,the rag attachment pads 130 a and 130 b wipe the floor by linearreciprocation movements.

Pad guide members 190 are constituted by a first pad guide member 190 aconfigured to guide the first rag attachment pad 130 a and a second padguide member 190 b configured to guide the second rag attachment pad 130b.

As illustrated in FIGS. 3 and 9, the first pad guide member 190 a isconstituted by first slope rails 191 aL and 191 aR formed in the leftand right sides of the base 111, and left and right first slope wheels195 aL and 195 aR left and right first slope configured to roll alongthe rails 191 aL and 191 aR. The left and right first slope wheel 195 aLand 195 aR are provided in the opposite sides of the first ragattachment pad 130 a.

In addition, the left and right first slope wheels 195 aL and 195 aR areimplemented by left and right first slope rolls.

The lower ends of the left and right first slope rolls are slantinglyinstalled at the upper ends of first roll support brackets 197 a,respectively, in which the lower ends of the first roll support brackets197 a are fixed to the first rag attachment pad 130 a. At the upper endsof the first roll support brackets 197 a, the rotation axles of the leftand right first slope rolls are slantingly installed, respectively.

That is, when only one first left roll support bracket 197 aL isdescribed, as illustrated in FIG. 10, the first left roll supportbracket 197 aL is constituted by a base plate 197′ attached to orintegrally molded with the rag attachment pad 130 a, a vertical bracket197″ extending vertically from the base plate 197′, and an inclinedbracket 197″′ extending from the free end of the vertical bracket 197″toward an outward upper side.

In addition, at the center of the inclined bracket 197″′, a female screw198 a, to which a piece is fastened as illustrated in FIG. 9, is formed,and at the circumferential surface of the inclined bracket 197″′, acatch step 198 b is formed to prevent the roll 195 aL from beingintroduced anymore.

The left and right first slope rails 191 aL and 191 aR, whichrespectively correspond to left and right first slope wheels 195 aL and195 aR, are constituted by left and right first slope rail grooves 192aL and 192 aR formed in the left and right sides of the bottom surfaceof the base 111, and left and right first slope roll abutment pieces 194aL and 194 aR configured to abut the left and right first slope rolls,respectively.

In addition, it is preferred that the left and right first slope railgrooves 192 aL and 192 aR are further formed with left and right firstcatch steps 193 aL and 193 aR, respectively, to which the top surfacesof the left and right first slope rolls are caught.

The first catch steps 193 aL and 193 aR function as anti-pushing stepsfor suppressing the first rag attachment pad 130 a from beingadditionally lifted even if it is pushed.

The left and right first slope roll abutment pieces 194 aL and 194 aRare fixed by inserting them into the left and right first slope railgrooves 192 aL and 192 aR in the directions as indicated by arrows inFIG. 4 and then fastening them by screws.

As illustrated in FIG. 9, each of the first slope roll abutment pieces194 aL and 194 aR are divided into screw fastening abutment 194′, and aslope roll abutment 194″ abutting the bottom surfaces of the first sloperail rolls.

Likewise, the second pad guide member 190 b is also constituted bysecond slope rails 191 bL and 191R formed in the left and right sides ofthe base 111, and left and right second slope wheel 195 bL and 195 bRconfigured to roll along the left and right second slope rails 191 bLand 191 bR, respectively.

The left and right second slope wheels 195 bL and 195 bR are installedat the opposite sides of the second rag attachment pad 130 b,respectively.

In addition, the left and right second slope wheels 195 aL are 195 aRare implemented by left and right second slope rolls.

The left and right second slope rolls are slantingly installed at thesecond roll support brackets 197 b, the lower ends of which are fixed tothe second rag attachment pad 130 b, respectively. That is, the rotationaxles of the left and right second slope rolls are slantingly installedat the upper ends of the second roll support brackets 197 b,respectively.

The left and right second slope rails 191 bL and 191 bR, whichrespectively correspond to left and right second slope wheels 195 bL and195 bR, are constituted by left and right second slope rail grooves 192bL and 192 bR formed in the left and right sides of the bottom surfaceof the base 111, and left and right second slope roll abutment pieces194 bL and 194 bR configured to abut the left and right second sloperolls, respectively.

In addition, it is preferred that the left and right second slope railgrooves 192 bL and 192 bR are further formed with left and right secondcatch steps 193 bL and 193 bR, respectively, to which the top surfacesof the left and right second slope rolls are caught.

The second catch steps 193 bL and 193 bR function as anti-pushing stepsfor suppressing the second rag attachment pad 130 b from beingadditionally lifted even if it is pushed.

The left and right second slope roll abutment pieces 194 bL and 194 bRare fixed by inserting them into the left and right second slope railgrooves 192 aL and 192 aR in the directions as indicated by arrows inFIG. 4, and then fastening them by screws.

As illustrated in FIG. 9, each of the second slope roll abutment pieces194 bL and 194 bR are divided into screw fastening abutment 194′, and aslope roll abutment 194″ abutting the bottom surfaces of the secondslope rail rolls.

The left slope wheels 195 aL and 195 bL as described above areimplemented by left slope rolls arranged with a minus (−) slope, and theright slope wheels 195 aR and 195 bR are implemented by right sloperolls arranged with a plus (+) slope.

Accordingly, when viewed from the front side or rear side, the slopewheels are inclined in a funnel shape.

Due to these slopes, when the rag attachment pads 130 a and 130 b are towander leftward or rightward while being linearly reciprocated back andforth, the slope wheels instantly align the rag attachment pads 130 aand 130 b back and forth. Accordingly, it would be sufficient even ifthe rolls are employed instead of bearings which are expensive andcomplicated to assemble.

In addition, because the linear guidance back and forth is automaticallyaligned and hence a great load is applied, two pad reciprocation members170 a and 170 b can be driven by a single driving member 150. For thisreason, the driving member 150 may be mounted on the base 111 to be laidhorizontally. Accordingly, the height of body case 110 may besubstantially lowered, thereby improving the cleaning efficiency of agap.

Furthermore, due to the inclination in the funnel shape, the first andsecond slope rail grooves 192 aL; 192 aR and 192 bL; 192 bR may beformed on the bottom surface of the base 111. Accordingly, the first andsecond slope wheels 195 aL; 195 aR and 195 bL; 195 bR may not be exposedto the top side of the base 111, and hence, no hole for extracting thefirst and second slope wheels 195 aL; 195 aR and 195 bL; 195 bR isformed. As a result, as described below, steam is originally preventedfrom flowing backward into the inside of the body case 110 through sucha hole.

Meanwhile, the floor cleaner according to the present exemplaryembodiment may further include a steam mechanism configured to injectsteam.

In the base 111, a steam supply port 200 is formed.

Specifically, a tube is connected to the steam supply port 200 throughthe neck assembly 500, so that steam generated from a steam generationapparatus within the pushrod assembly 300 is transmitted to the steamsupply port 200.

In addition, as illustrated in FIG. 4, on the bottom surface of the base111, a distribution path is formed to distribute the steam dischargedfrom the steam supply port 200 to the rag attachment pads 130.

The distribution paths are constituted by a distribution groove 210formed on the bottom surface of the base 111 to be communicated with thesteam supply port 200, and a steam injection cover 230 which is formedwith a plurality of steam injection holes 231 configured to inject steamto the rag attachment pads 130 and covers the distribution groove 210.

The steam injection cover 230 is fastened to the distribution groove 210by screws.

Meanwhile, the rag attachment pads 130 are formed with steam passageholes 135 to allow the steam discharged from the steam injection holes231 to be directed toward the rags or pads.

However, because the rag attachment pads 130 reciprocate back and forth,the gaps between the steam injection holes 231 and the steam passageholes 135 are too large. Therefore, the steam may spread out laterallywithout arriving at the steam passage holes 135.

In order to prevent this, it is preferred that the steam injection holes231 are respectively formed with steam injection protrusions 233 whichextend toward the steam passage holes 135 as illustrated in FIG. 9.

In addition, each of the steam passage holes 135 is preferably formed asan elongated bore such that the steam injection protrusions 233 are notinterrupted when the rag attachment pads 130 are reciprocated.

The steam injected from the steam injection protrusions 233 may permeateinto the rags or the pads. However, the steam, which does not permeateinto the rags or the pads, may permeate into the through-hole 111 a and111 b of the base 111 and may cause the loss of the steam and theelectrical short of the driving member 150.

In order to prevent this, it is preferred to provide a sealing member250 around the through-holes 111 a and 111 b of the base 111 tosealingly wrap the pad reciprocation members 170 a and 170 b.

As illustrated in FIGS. 5 and 6, the sealing member 250 includes asurrounding wall 251 configured to surround the through-holes 111 a and111 b and the pad reciprocation members 170 a and 170 b surrounding wall251, and a top cover 253 configured to cover the top of the surroundingwall 251.

It is preferred that a seal formed from a rubber material is interposedbetween the surrounding wall 251 and the top cover 253.

The top cover 253 is fastened and fixed to the fastening ribs 114 of thebase 111.

One side 252 of the surrounding wall 251 and one side 254 of the topcover 253 are formed with semi-circular grooves, respectively, to sealand support the front end of the motor mounting tube 156.

Meanwhile, as illustrated in FIG. 6, it is preferred that a neck seatingunit 270 is formed on the top of the top cover 253, and the neckassembly 500, to which the pushrod assembly 300 is assembled to bepivotable back and forth, is seated on the neck seating unit 270.

On the neck seating unit 270, a hinge seating abutment recess 271 in asemi-circular shape is formed in which the bottom surface of the neckhinge 510, and a hinge seating support recess 273 is formed around thecommunication hole 115 to catch the top surface of the neck hinge 510 tobe seated.

It is preferred that the neck seating unit 270 is also fastened andfixed to the fastening ribs 116 of the base 111.

Although the preferred embodiments of the inventive base assembly for afloor cleaner have been presented for illustrative purposes fordescribing the technical idea of the present invention, they do notlimit the scope of the present invention. In addition, those skilled inthe art will appreciate that various modifications, additions andsubstitutions may be made without departing from the scope and spirit ofthe invention as disclosed in the accompanying claims. Therefore, thescope of the present invention shall be construed on the basis of theaccompanying claims rather than the detailed description above in such amanner that all the changes and modifications drawn from the meanings,scopes and equivalent concepts of the claims belong to the scope of thepresent invention.

REFERENCE NUMERAL

10: floor cleaner

100: base assembly

110: body case

111: base

111 a, 111 b: through-hole

112, 114, 116: fastening rib

113: cover 115: communication hole

130, 130 a, 130 b: rag attachment pad

135: steam passage hole

150: driving member

151: driving motor

152: driving motor unit

153: planetary reduction gear

153 a: rotation axle

155: motor mounting case

156: motor mounting tube

156 a: cooling through-hole

156 b: flange

156 c: vertical fastening hole

157: closed tube

157 a: draw-out hole

157 b: horizontal fastening hole

170: pad reciprocation member

171 a, 171 b: pad reciprocation eccentric cam

173 a, 173 b: hinge bracket

175 a, 175 b: pad reciprocation rod

177 a, 177 b: hinge axle

190, 190 a, 190 b: pad guide member

191 aL, 191 aR: first slope rail

191 bL, 191 bR: second slope rail

192 aL, 192 aR: first slope rail groove

192 bL, 192 bR: second slope rail groove

193 aL, 193 aR: first catch step

193 bL, 193 bR: second catch step

194 aL, 194 aR: first slope roll abutment piece

194 bL, 194 bR: second slope roll abutment piece

195 aL, 195 aR: first slope wheel (roll)

195 bL, 195 bR: second slope wheel (roll)

197 a, 197 b: roll support bracket

194′: screw fastening abutment

194″: slope roll abutment

197′: base plate

197″: vertical bracket

197″′: inclined bracket

198 a: female screw

198 b: catch step

200: steam supply port

210: distribution groove

230: steam injection cover

231: steam injection hole

233: steam injection protrusion

250: sealing member

251: surrounding wall

253: top cover

270: neck seating unit

271: hinge seating abutment recess

273: hinge seating support recess

300: pushrod assembly

500: neck assembly

510: neck hinge

1. A base assembly for a floor cleaner comprising: a base having a frontside, a rear side, a left side, a right side and a bottom side; one ormore rag attachment pads disposed on the bottom side of the base, andconfigured to to be linearly reciprocated in a horizontal plane by adriving member; a steam supply port formed in the base; and adistribution path formed on the bottom side of the base and configuredto distribute steam discharged from the steam supply port to the ragattachment pads, wherein the rag attachment pads are formed with steampassage holes configured to receive and pass there-through steamdischarged from the distribution path.
 2. The base assembly of claim 1,wherein the distribution path comprises: a distribution groove formed onthe bottom side of the base, the distribution groove communicating withthe steam supply port, and a steam injection cover formed with aplurality of steam injection holes for injecting steam to the ragattachment pads and configured to cover the distribution groove, whereinthe steam injection holes are formed with steam injection protrusionsprotruding toward the steam passage holes, and each of the steam passageholes is formed by an elongated hole.
 3. The base member assembly ofclaim 2, further comprising: one or more pad guide members configured toguide the linear reciprocation of the rag attachment pads in relation tothe base, wherein the pad guide members comprise slope rails formed inthe left and right sides of the base, and left and right slope wheelsinstalled on the opposite sides of the rag attachment pads and rollingalong the left and right slope rails, wherein the left and right sloperails comprise left and right slope rail grooves formed on the left andright sides of the bottom side of the base, and contacted with the topsurfaces of the left and right slope rolls, and wherein the left andright roll abutment pieces configured to abut the left and right sloperolls are fastened to the bottom side of the base.
 4. The base memberassembly of claim 1, further comprising: one or more pad reciprocationmembers configured to receive power from the driving member and tolinearly reciprocate the rag attachment pads, wherein the rag attachmentpads comprise first and second rag attachment pads disposed on the frontand rear sides of the bottom side of the base, wherein the padreciprocation members comprise first and second pad reciprocationmembers that are configured to receive the power of the driving memberand to make the first and second rag attachment pads come close to andgo away from each other, wherein the pad guide members comprise firstand second pad guide members configured to guide the linearreciprocation movement of the first and second rag attachment pads,wherein the base is formed with a through-hole, wherein the drivingmember comprises a driving motor, wherein the first and second padreciprocation members comprise: first and second pad reciprocationeccentric cams, to each of which a rotation axle of the driving motor iseccentrically joined; and first and second pad reciprocation rods, oneend of each of the first and second pad reciprocation rods beinginstalled on one of hinge brackets of the first and second ragattachment pads, and the other end of each of the first second padreciprocation rods being installed on one of the first and second padreciprocation eccentric cams, and wherein the driving member ishorizontally arranged on the base.
 5. The base member assembly of claim2, further comprising: one or more pad reciprocation members configuredto receive power from the driving member and to linearly reciprocate therag attachment pads, wherein the rag attachment pads comprise first andsecond rag attachment pads disposed on the front and rear sides of thebottom side of the base, wherein the pad reciprocation members comprisefirst and second pad reciprocation members that are configured toreceive the power of the driving member and to make the first and secondrag attachment pads come close to and go away from each other, whereinthe pad guide members comprise first and second pad guide membersconfigured to guide the linear reciprocation movement of the first andsecond rag attachment pads, and wherein the base is formed with athrough-hole, wherein the driving member comprises a driving motor,wherein the first and second pad reciprocation members comprise: firstand second pad reciprocation eccentric cams, to each of which a rotationaxle of the driving motor is eccentrically joined; and first and secondpad reciprocation rods, one end of each of the first and second padreciprocation rods being installed on one of hinge brackets of the firstand second rag attachment pads, and the other end of each of the firstsecond pad reciprocation rods being installed on one of the first andsecond pad reciprocation eccentric cams, and wherein the driving memberis horizontally arranged on the base.
 6. The base member assembly ofclaim 3, further comprising: one or more pad reciprocation membersconfigured to receive power from the driving member and to linearlyreciprocate the rag attachment pads, wherein the rag attachment padscomprise first and second rag attachment pads disposed on the front andrear sides of the bottom side of the base, wherein the pad reciprocationmembers comprise first and second pad reciprocation members that areconfigured to receive the power of the driving member and to make thefirst and second rag attachment pads come close to and go away from eachother, wherein the pad guide members comprise first and second pad guidemembers configured to guide the linear reciprocation movement of thefirst and second rag attachment pads, and wherein the base is formedwith a through-hole, wherein the driving member comprises a drivingmotor, wherein the first and second pad reciprocation members comprise:first and second pad reciprocation eccentric cams, to each of which arotation axle of the driving motor is eccentrically joined; and firstand second pad reciprocation rods, one end of each of the first andsecond pad reciprocation rods being installed on one of hinge bracketsof the first and second rag attachment pads, and the other end of eachof the first second pad reciprocation rods being installed on one of thefirst and second pad reciprocation eccentric cams, and wherein thedriving member is horizontally arranged on the base.
 7. The baseassembly of claim 1, wherein the driving member comprises a motor. 8.The base assembly of claim 1, comprising more than one rag attachmentpad, said pads disposed side-by-side on the bottom side of the base andconfigured to be linearly reciprocated in a horizontal plane by adriving member.
 9. The base assembly of claim 8, wherein the drivingmember comprises a motor.
 10. The base assembly of claim 1, comprisingmore than one rag attachment pad, said pads disposed side-by-side on thebottom side of the base and configured to be linearly reciprocatedtoward and away from each other in a horizontal plane by a drivingmember.
 11. The base assembly of claim 10, wherein the driving membercomprises a motor.